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Date: | Fri, 26 Jan 2007 12:35:33 GMT |
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>>Oxalic in late fall is not a safe for the coming winter but for the
winter after that.
This is an excellent point. OA is very effective - from 85% to 100%
depending on the study - in eliminating varroa. It's a pleasure to
see colonies of vibrant honey bees the following spring. Barring
mite re-infestation and perhaps susceptible genetics, these colonies
will continue strong until the next fall.
That next fall I like to identify the best hives, in terms of honey
production and mite tolerance, for queen rearing the following
spring. Hopefully, one day I'll be able to either skip the OA
treatment or do it every other year.
As far as the effectiveness, I believe, if one uses precisely the
prescribed method (ie. the 3.5% concentration and 4-5 ml of solution
per a full Langstroth bee space) in the broodless period, one
consistently approaches a 100% mite kill w/o serious harm to the bees.
Waldemar
-- Visit www.honeybeeworld.com/bee-l for rules, FAQ and other info ---
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